Increase the sleep duration for waiting for AppOp changes

Test testWriteStorageInvalidation seems to be flaky, but doesn't fail in
local repo even with --iterations 100. Hence increasing the sleep()
duration to reduce the test failure rate.

Bug: 191724755
Test: atest
android.scopedstorage.cts.device.ScopedStorageDeviceTest#testWriteStorageInvalidation
--iterations 100

Change-Id: I5c472b915d0b746d12d0021dd3e054b3794c5cf5
1 file changed